diff --git a/include/mme-app/hash.h b/include/mme-app/hash.h
new file mode 100644
index 0000000..739f707
--- /dev/null
+++ b/include/mme-app/hash.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2003-2018, Great Software Laboratory Pvt. Ltd.
+ * Copyright (c) 2017 Intel Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+#ifndef __IMSI_LOOKUP_H_
+#define __IMSI_LOOKUP_H_
+
+int
+init_hash();
+
+#endif /*__IMSI_LOOKUP_H_*/